WO2019042758A1 - Système de raffinage conique - Google Patents

Système de raffinage conique Download PDF

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Publication number
WO2019042758A1
WO2019042758A1 PCT/EP2018/071993 EP2018071993W WO2019042758A1 WO 2019042758 A1 WO2019042758 A1 WO 2019042758A1 EP 2018071993 W EP2018071993 W EP 2018071993W WO 2019042758 A1 WO2019042758 A1 WO 2019042758A1
Authority
WO
WIPO (PCT)
Prior art keywords
grinding
mahlleisten
arrangement according
axis
refining
Prior art date
Application number
PCT/EP2018/071993
Other languages
German (de)
English (en)
Inventor
Marcel Schmid
Martin Schmid
Original Assignee
Voith Patent Gmbh
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Voith Patent Gmbh filed Critical Voith Patent Gmbh
Priority to DE212018000303.3U priority Critical patent/DE212018000303U1/de
Priority to FIU20204028U priority patent/FI12655U1/fi
Priority to CN201890001136.6U priority patent/CN212925594U/zh
Priority to ATGM9003/2018U priority patent/AT16791U1/de
Publication of WO2019042758A1 publication Critical patent/WO2019042758A1/fr

Links

Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21D—TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
    • D21D1/00—Methods of beating or refining; Beaters of the Hollander type
    • D21D1/20—Methods of refining
    • D21D1/30—Disc mills
    • D21D1/306—Discs
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21D—TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
    • D21D1/00—Methods of beating or refining; Beaters of the Hollander type
    • D21D1/20—Methods of refining
    • D21D1/22—Jordans

Definitions

  • the invention relates to a Mahlan extract for grinding aqueous pulp fibers suspended between two forming a grinding gap, moving relative to each other, conical grinding surfaces with Mahlleisten and extending grooves, wherein at least one grinding surface rotates about the cone axis and the Mahlleisten on the corresponding conical grinding surface with one
  • Direction component run radially to the axis of rotation.
  • the grinding strips are called knives and the grinding surfaces are formed by grinding sets.
  • the refiner can be designed as a disc refiner or as here treated as a cone refiner.
  • the grinding sets must be optimally adapted to the pulp to be treated, also to prevent excessive wear of the sets.
  • Waste paper fibers, as their content of long fibers can vary considerably.
  • the object of the invention is therefore to ensure efficient and gentle grinding with the least possible wear.
  • the object is achieved in that the perpendicular to the grinding gap extending side surfaces of Mahlleisten each composed radially outwardly from a plurality of straight, angled portions and at least one grinding surface of several circumferentially juxtaposed grinding sectors, the Mahlleisten each Mahlsektors, ie the opposite side surfaces of adjacent Mahlleisten each parallel to each other. Since at least the majority of Mahlleisten without interruption extend radially as far as possible over the entire grinding surface, can vortex, which convey the pulp in the grinding gap, form better in the grooves.
  • the cutting angle is formed by the two grinding edges of the sweeping Mahlleisten the opposing grinding surfaces in their relative movement.
  • both grinding surfaces should consist of several, in
  • the boundary line of the grinding sectors in the circumferential direction should extend in a sawtooth radially outward. Specifically, this means that the boundary line extends along the straight portion of the outer Mahlleisten and over the kinks of Mahlleisten the grinding sector.
  • the width of the Mahlleisten is advantageously constant and is preferably between 1, 2 and 1, 5 mm.
  • the width of the grooves should be at least predominantly constant. As a result, this allows maximization of the cut edge length.
  • the grinding surface is formed in each case by a plurality of detachably mounted grinding segments, each comprising 3 to 5 grinding sectors and / or extending over 6 to 18 ° of the circumference of the corresponding grinding surface.
  • both grinding surfaces rotate about the same axis of rotation in the opposite direction or at different speeds in the same direction or rotate only one grinding surface.
  • FIG. 1 shows a schematic cross section through a conical refiner
  • FIG. 2 a grinding segment
  • FIG. 3 shows a section according to FIG. 2
  • FIG. 4 another Mahlsegment
  • Figure 5 a section of another grinding segment
  • FIG. 6 shows another section of a further grinding segment.
  • a grinding gap 1 is formed by a fixed grinding surface 3 coupled to the housing 2 and a grinding surface 4 rotating about a rotation axis 10.
  • the rotational axis 10 coincide with the cone axis and extend the two conical grinding surfaces 3,4 parallel to each other, wherein the distance between these is usually adjustable.
  • the flow direction of the pulp suspension takes place in the axial, as well as in the radial direction, since the grinding gap 1 forms an angle between 20 and 35 ° with the axis of rotation 10 of the grinding surface 3, 4.
  • the rotating, radially inner grinding surface 4 is here moved by a rotatably mounted in the housing 2 shaft 1 1 in the direction of rotation 12. This shaft is 1 1 driven by an existing also in the housing 2 drive.
  • the fiber suspension to be grounded passes via an inlet 13 through the center into the grinding gap 1 between the two grinding surfaces 3, 4.
  • the fiber suspension passes the cooperating grinding surfaces 3,4 radially outward and leaves the adjoining annular space through a drain 14th
  • Both grinding surfaces 3, 4 are each formed by a plurality of grinding segments 5, which extend over in each case a circumferential region between 6 and 18 ° of the corresponding grinding surface 3, 4 and are supported on a support surface 15, 16 running parallel to the grinding gap 1 and detachably connected thereto ,
  • the grinding segments 5 result in a continuous grinding surface 3,4.
  • the grinding segments 5 and thus also the grinding surfaces 3, 4 are, as shown in FIGS. 2 to 6, formed by a multiplicity of radially extending grinding bars 6 and grooves 7 located therebetween.
  • Mahlleisten 6 also called knife
  • Mahlleisten 6 is generally rectangular, but there are other forms.
  • the grooves 7 extending between the milling strips 6 likewise have a rectangular cross-section and serve as flow channels for the fiber suspension.
  • the groove depth is usually between 2 and 20 mm.
  • essential to the invention here is that the perpendicular to the grinding gap 1 extending side surfaces of the Mahlleisten 6 each radially outwardly composed of a plurality of straight, mutually angled sections.
  • both grinding surfaces 3, 4 comprise a plurality of grinding sectors 8 arranged next to one another in the circumferential direction, wherein the grinding bars 6 of each grinding sector 8 each extend parallel to one another.
  • the angle of intersection results when the grinding edges of the milling strips 6, which are axially opposite one another relative to the axis of rotation 10, move past one another during the rotation of the grinding surface 4.
  • the grinding sectors 8 extend over 2 to 5 ° of the circumference of the corresponding grinding surface 3, 4, so that each grinding segment 5 comprises three to five grinding sectors 8.
  • the boundary line 9 extends between the grinding sectors 8 sawtooth radially outward. It runs the
  • FIGS. 2, 3 and 4 show a possibility of compensating for the widening by grinding surface 3, 4 in that some of the grinding strips 6 share radially outward.
  • the location of the division varies with respect to its distance from the axis of rotation 10. Also, a multiple division of a grinding bar 6 radially behind each other is possible. As a result, so the outgoing from the division of Mahlleisten 6
  • the length of the dividing section 17 is between 10 and 50 mm. To achieve the largest possible cutting edge length, the grinding bars 6 extend parallel outside the dividing sections 17.
  • the width of all Mahlleisten 6 and all grooves 7 outside the, following a division division sections 17 are the same size.
  • the grinding surface 3, 4 is used extensively, for which reason the radially inner end of all the grinding strips 6 of both grinding surfaces 3, 4 is equidistant from the axis of rotation 10.

Landscapes

  • Crushing And Grinding (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
  • Paper (AREA)

Abstract

L'invention concerne un système de raffinage servant au raffinage de fibres cellulosiques en suspension aqueuse entre deux surfaces de raffinage (3, 4) coniques formant un interstice de raffinage (1), mobiles l'une par rapport l'autre, munies de baguettes de raffinage (6) et de rainures (7) s'étendant entre lesdites baguettes. Au moins une surface de raffinage (3, 4) tourne autour de l'axe de cône, et les baguettes de raffinage (6) s'étendent radialement par rapport à l'axe de rotation (10) avec une composante de direction sur la surface de raffinage (3, 4) conique correspondante. L'invention vise à permettre un raffinage doux et efficace. À cet effet, les surfaces latérales des baguettes de raffinage (6) s'étendant perpendiculairement à l'interstice de raffinage (1) sont chacune composées radialement vers l'extérieur de plusieurs sections droites, à un angle les unes par rapport aux autres, et au moins une surface de raffinage (3, 4) est constituée de plusieurs secteurs de raffinage (8) agencés les uns à côté des autres dans une direction périphérique, les baguettes de raffinage (6) de chaque secteur de raffinage (8) s'étendant respectivement parallèlement les unes aux autres.
PCT/EP2018/071993 2017-09-01 2018-08-14 Système de raffinage conique WO2019042758A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
DE212018000303.3U DE212018000303U1 (de) 2017-09-01 2018-08-14 Konische Mahlanordnung
FIU20204028U FI12655U1 (fi) 2017-09-01 2018-08-14 Kartiomainen jauhatusjärjestely
CN201890001136.6U CN212925594U (zh) 2017-09-01 2018-08-14 圆锥研磨装置
ATGM9003/2018U AT16791U1 (de) 2017-09-01 2018-08-14 Konische Mahlanordnung

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102017120162.9A DE102017120162A1 (de) 2017-09-01 2017-09-01 Konische Mahlanordnung
DE102017120162.9 2017-09-01

Publications (1)

Publication Number Publication Date
WO2019042758A1 true WO2019042758A1 (fr) 2019-03-07

Family

ID=63209413

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2018/071993 WO2019042758A1 (fr) 2017-09-01 2018-08-14 Système de raffinage conique

Country Status (5)

Country Link
CN (1) CN212925594U (fr)
AT (1) AT16791U1 (fr)
DE (2) DE102017120162A1 (fr)
FI (1) FI12655U1 (fr)
WO (1) WO2019042758A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021104747A1 (fr) * 2019-11-29 2021-06-03 Voith Patent Gmbh Appareil de traitement de matériau fibreux

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015223027A1 (de) * 2015-11-23 2017-05-24 Voith Patent Gmbh Mahlgarnitur

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI121509B (fi) * 2007-11-30 2010-12-15 Metso Paper Inc Jauhimen staattorin jauhinpinta, jauhinpinnan teräsegmentti ja jauhin
DE102008059610A1 (de) * 2008-11-28 2010-06-02 Voith Patent Gmbh Verfahren zur Mahlung von wässrig suspendierten Zellstofffasern sowie Mahlgarnituren zu seiner Durchführung
DE102015202318A1 (de) * 2015-02-10 2016-08-11 Voith Patent Gmbh Mahlgarnitur

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015223027A1 (de) * 2015-11-23 2017-05-24 Voith Patent Gmbh Mahlgarnitur

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021104747A1 (fr) * 2019-11-29 2021-06-03 Voith Patent Gmbh Appareil de traitement de matériau fibreux

Also Published As

Publication number Publication date
DE102017120162A1 (de) 2019-03-07
AT16791U1 (de) 2020-09-15
CN212925594U (zh) 2021-04-09
FI12655U1 (fi) 2020-05-15
DE212018000303U1 (de) 2020-05-15

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